초록 ▼

A metal material having a photocatalytic activity which comprises an anodized layer and a thin layer containing titanium oxide powder which are heat treated are sequentially laminated on the surface of a substrate comprising metal material including titanium. By anodically oxidizing the metal materi

A metal material having a photocatalytic activity which comprises an anodized layer and a thin layer containing titanium oxide powder which are heat treated are sequentially laminated on the surface of a substrate comprising metal material including titanium. By anodically oxidizing the metal material including titanium, an anodized layer is formed on the surface thereof. A thin layer containing titanium oxide powder is further coated on this surface, and heat treatment is carried out before and/or after forming this thin layer containing titanium oxide powder.

대표청구항 ▼

[ What is claimed is:] [14.] A metal material having a photocatalytic activity in which the amount of iodine generated is more than 10.times.10.sup.-5 mol/30 min when measured by the potassium iodide decomposition method, the metal material comprising:a substrate comprising titanium;an anodized laye

[ What is claimed is:] [14.] A metal material having a photocatalytic activity in which the amount of iodine generated is more than 10.times.10.sup.-5 mol/30 min when measured by the potassium iodide decomposition method, the metal material comprising:a substrate comprising titanium;an anodized layer provided on a surface of the substrate by heating the substrate at a temperature ranging from 200 to 600.degree. C. such that the anodized layer has a color selected from the group consisting of fresh water color, pink color, dark red color, pink and white color; anda thin layer containing titanium oxide powder coated on the anodized layer after the anodized layer has been heat treated.